kabul. we've been watching live pictures, seeing helicopters overhead as well. we caught up with you. what's transpired? what have you learned since then? >> reporter: i'm sorry, could you repeat that? you dropped out for part of the question. you said you saw some of the helicopters and then i lost audio. >> what are you seeing on the ground there, richard? what are you learning? >> reporter: well, i think it's hard right now. you can see one of the helicopters is passing overhead as we speak. and that has been happening all day long, as the diplomatic center of kabul is emptying out. not just the u.s. embassy. other governments are doing the same thing with their personnel. and they are heading toward the airport. the airport has become the last stand in this city. it's become a place, a staging ground for an evacuation. when we arrived today into the airport, we saw military transport jets on the runway. we saw some troop personnel who were there, apparently taking